rk3288: vyasa: Add eMMC boot support

RK3288 Vyasa has eMMC boot support, with JP4 open.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

arch/arm/dts/rk3288-vyasa-u-boot.dtsi

@@ -20,6 +20,10 @@
 	u-boot,dm-pre-reloc;
 };
 
+&emmc {
+	u-boot,dm-pre-reloc;
+};
+
 &uart2 {
 	u-boot,dm-pre-reloc;
 };

arch/arm/dts/rk3288-vyasa.dts

@@ -155,6 +155,17 @@
 	cpu0-supply = <&vdd_cpu>;
 };
 
+&emmc {
+	bus-width = <8>;
+	cap-mmc-highspeed;
+	disable-wp;
+	non-removable;
+	pinctrl-names = "default";
+	pinctrl-0 = <&emmc_clk &emmc_cmd &emmc_pwr &emmc_bus8>;
+	vmmc-supply = <&vcc_io>;
+	status = "okay";
+};
+
 &gmac {
 	assigned-clocks = <&cru SCLK_MAC>;
 	assigned-clock-parents = <&ext_gmac>;

board/amarula/vyasa-rk3288/vyasa-rk3288.c

@@ -9,6 +9,13 @@
 #ifndef CONFIG_TPL_BUILD
 #include <spl.h>
 
+void board_boot_order(u32 *spl_boot_list)
+{
+	/* eMMC prior to sdcard. */
+	spl_boot_list[0] = BOOT_DEVICE_MMC2;
+	spl_boot_list[1] = BOOT_DEVICE_MMC1;
+}
+
 int spl_start_uboot(void)
 {
         /* break into full u-boot on 'c' */